Representatives from G20 nations met in Berlin on Thursday to address the contentious issue of oversupply in the world steel market, which has led to lower prices and fears of job losses in steel-producing countries. China, which accounts for nearly half the world's supply, was represented at the talks by Assistant Minister of Commerce Li Chenggang, who said China had already taken significant steps to reduce its steel production and stressed that it needed to be a joint effort. But while the United States' representative Jamieson Greer praised the initial steps, he also said the G20 hadn't been able to make "meaningful progress" on addressing the "root causes" of the overcapacity.